Trivial Mental Connections

This is a thing that I've been thinking about for years, but never put into words. When I eat black olives, I think of freshly sharpened pencils. Today, while eating a sandwich containing black olives, I had the thought again. This time, I caught the thought and held onto it long enough to become aware of the connection. To me, black olives taste like the smell of sharpening a pencil. I don't know if the smell is caused by the lead, the wood, the paint on the pencil, or a combination of them.